Pure Solids and Pure Liquids

[505095793]

Is equilibrium affected by addition/removal of a pure solid or pure liquid?

[Kyle Golden Dis 2G]

The equilibrium constant is not affect by pure liquids or solids. Only gases and aqueous solutions affect equilibrium.

[Julia Go 2L]

Unlike gases and aqueous solutions, pure liquids and solids do not change in molar concentration in a reaction. So, we do not need to include them in equilibrium constant expressions. Also, solvents (ex: water) are omitted from equilibrium constant expressions because the change in solvent concentration is insignificant.

[Kimberly 1H]

Consider the activities of pure solids and liquids as 1. Even when you include them in the calculation for equilibrium constant, they doesn't affect the result.

[michelle]

No. Water is only considered in the calculation when it is in gas phase.